CBSE - Aptitude Mathematics

Which of the following is not true about harmonic mean? 1.it utilizes all the items of the data 2.it lends itself to algebraic calculation 3.it is not easily calculated 4.it can be obtained by inspection

The value of the item corresponding to maximum frequency is 1.mode 2.mean 3.median 4.lower quartile

Mukesh Sharma loses 12 1/2% of his money and after spending 70% of the remainder, has left Rs.1,050. At first Mukesh had 1. Rs.6,000 2. Rs.4,500 3. Rs.3,000 4. Rs.4,000

If x + 2y = 2x + y, then x - y is equal to 1. 0 2. 2 3. 4 4. 5

If 18, persons can build a 140m long wall in 42 days, the number of days that 30 persons will take to complete a similar 100m long wall is : 1) 18 2) 21 3) 24 4) 28